Ken Todotani / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F401RE/pwmout_api.c@250:a49055e7a707, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 11:15:08 2014 +0100
Revision:
250:a49055e7a707
Parent:
226:b062af740e40
Child:
251:de9a1e4ffd79
Synchronized with git revision 3197042b65f8d28e856e1a7812d45e2fbe80e3f1



Full URL: https://github.com/mbedmicro/mbed/commit/3197042b65f8d28e856e1a7812d45e2fbe80e3f1/



error.h -> mbed_error.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 87:085cde657901 1 /* mbed Microcontroller Library
mbed_official 87:085cde657901 2 *******************************************************************************
mbed_official 87:085cde657901 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 87:085cde657901 4 * All rights reserved.
mbed_official 87:085cde657901 5 *
mbed_official 87:085cde657901 6 * Redistribution and use in source and binary forms, with or without
mbed_official 87:085cde657901 7 * modification, are permitted provided that the following conditions are met:
mbed_official 87:085cde657901 8 *
mbed_official 87:085cde657901 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 87:085cde657901 10 * this list of conditions and the following disclaimer.
mbed_official 87:085cde657901 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 87:085cde657901 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 87:085cde657901 13 * and/or other materials provided with the distribution.
mbed_official 87:085cde657901 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 87:085cde657901 15 * may be used to endorse or promote products derived from this software
mbed_official 87:085cde657901 16 * without specific prior written permission.
mbed_official 87:085cde657901 17 *
mbed_official 87:085cde657901 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 87:085cde657901 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 87:085cde657901 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 87:085cde657901 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 87:085cde657901 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 87:085cde657901 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 87:085cde657901 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 87:085cde657901 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 87:085cde657901 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 87:085cde657901 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 87:085cde657901 28 *******************************************************************************
mbed_official 87:085cde657901 29 */
mbed_official 87:085cde657901 30 #include "pwmout_api.h"
mbed_official 87:085cde657901 31
mbed_official 172:2f4f8c56b261 32 #if DEVICE_PWMOUT
mbed_official 172:2f4f8c56b261 33
mbed_official 87:085cde657901 34 #include "cmsis.h"
mbed_official 87:085cde657901 35 #include "pinmap.h"
mbed_official 250:a49055e7a707 36 #include "mbed_error.h"
mbed_official 87:085cde657901 37
mbed_official 125:23cc3068a9e4 38 // TIM5 cannot be used because already used by the us_ticker
mbed_official 87:085cde657901 39 static const PinMap PinMap_PWM[] = {
mbed_official 125:23cc3068a9e4 40 {PA_0, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
mbed_official 172:2f4f8c56b261 41 // {PA_0, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH1
mbed_official 125:23cc3068a9e4 42 {PA_1, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH2
mbed_official 172:2f4f8c56b261 43 // {PA_1, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH2
mbed_official 125:23cc3068a9e4 44 {PA_2, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH3
mbed_official 172:2f4f8c56b261 45 // {PA_2, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH3
mbed_official 172:2f4f8c56b261 46 // {PA_2, PWM_9, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9)}, // TIM9_CH1
mbed_official 226:b062af740e40 47 {PA_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH4
mbed_official 172:2f4f8c56b261 48 // {PA_3, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH4
mbed_official 172:2f4f8c56b261 49 // {PA_3, PWM_9, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9)}, // TIM9_CH2
mbed_official 125:23cc3068a9e4 50 {PA_5, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
mbed_official 125:23cc3068a9e4 51 {PA_6, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH1
mbed_official 125:23cc3068a9e4 52 {PA_7, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1N
mbed_official 172:2f4f8c56b261 53 // {PA_7, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2
mbed_official 125:23cc3068a9e4 54 {PA_8, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1
mbed_official 125:23cc3068a9e4 55 {PA_9, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2
mbed_official 125:23cc3068a9e4 56 {PA_10, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH3
mbed_official 125:23cc3068a9e4 57 {PA_11, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH4
mbed_official 125:23cc3068a9e4 58 {PA_15, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
mbed_official 125:23cc3068a9e4 59
mbed_official 125:23cc3068a9e4 60 {PB_0, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2N
mbed_official 172:2f4f8c56b261 61 // {PB_0, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH3
mbed_official 125:23cc3068a9e4 62 {PB_1, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH3N
mbed_official 172:2f4f8c56b261 63 // {PB_1, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH4
mbed_official 125:23cc3068a9e4 64 {PB_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH2
mbed_official 125:23cc3068a9e4 65 {PB_4, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH1
mbed_official 125:23cc3068a9e4 66 {PB_5, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2
mbed_official 125:23cc3068a9e4 67 {PB_6, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH1
mbed_official 125:23cc3068a9e4 68 {PB_7, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH2
mbed_official 125:23cc3068a9e4 69 {PB_8, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH3
mbed_official 172:2f4f8c56b261 70 // {PB_8, PWM_10,STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM10)}, // TIM10_CH1
mbed_official 125:23cc3068a9e4 71 {PB_9, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH4
mbed_official 172:2f4f8c56b261 72 // {PB_9, PWM_11,STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM11)}, // TIM11_CH1
mbed_official 125:23cc3068a9e4 73 {PB_10, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH3
mbed_official 125:23cc3068a9e4 74 {PB_13, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1N
mbed_official 125:23cc3068a9e4 75 {PB_14, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2N
mbed_official 125:23cc3068a9e4 76 {PB_15, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH3N
mbed_official 185:e752b4ee7de1 77
mbed_official 125:23cc3068a9e4 78 {PC_6, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH1
mbed_official 125:23cc3068a9e4 79 {PC_7, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2
mbed_official 125:23cc3068a9e4 80 {PC_8, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH3
mbed_official 145:cfacfb0a9e19 81 {PC_9, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH4
mbed_official 185:e752b4ee7de1 82
mbed_official 87:085cde657901 83 {NC, NC, 0}
mbed_official 87:085cde657901 84 };
mbed_official 87:085cde657901 85
mbed_official 87:085cde657901 86 static TIM_HandleTypeDef TimHandle;
mbed_official 87:085cde657901 87
mbed_official 172:2f4f8c56b261 88 void pwmout_init(pwmout_t* obj, PinName pin) {
mbed_official 87:085cde657901 89 // Get the peripheral name from the pin and assign it to the object
mbed_official 87:085cde657901 90 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 172:2f4f8c56b261 91
mbed_official 87:085cde657901 92 if (obj->pwm == (PWMName)NC) {
mbed_official 87:085cde657901 93 error("PWM error: pinout mapping failed.");
mbed_official 87:085cde657901 94 }
mbed_official 172:2f4f8c56b261 95
mbed_official 87:085cde657901 96 // Enable TIM clock
mbed_official 125:23cc3068a9e4 97 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
mbed_official 87:085cde657901 98 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 87:085cde657901 99 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 87:085cde657901 100 if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE();
mbed_official 125:23cc3068a9e4 101 if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();
mbed_official 125:23cc3068a9e4 102 if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE();
mbed_official 125:23cc3068a9e4 103 if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE();
mbed_official 172:2f4f8c56b261 104
mbed_official 87:085cde657901 105 // Configure GPIO
mbed_official 87:085cde657901 106 pinmap_pinout(pin, PinMap_PWM);
mbed_official 172:2f4f8c56b261 107
mbed_official 87:085cde657901 108 obj->pin = pin;
mbed_official 87:085cde657901 109 obj->period = 0;
mbed_official 87:085cde657901 110 obj->pulse = 0;
mbed_official 172:2f4f8c56b261 111
mbed_official 87:085cde657901 112 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 87:085cde657901 113 }
mbed_official 87:085cde657901 114
mbed_official 87:085cde657901 115 void pwmout_free(pwmout_t* obj) {
mbed_official 172:2f4f8c56b261 116 // Configure GPIO
mbed_official 172:2f4f8c56b261 117 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 87:085cde657901 118 }
mbed_official 87:085cde657901 119
mbed_official 87:085cde657901 120 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 87:085cde657901 121 TIM_OC_InitTypeDef sConfig;
mbed_official 125:23cc3068a9e4 122 int channel = 0;
mbed_official 125:23cc3068a9e4 123 int complementary_channel = 0;
mbed_official 125:23cc3068a9e4 124
mbed_official 87:085cde657901 125 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 172:2f4f8c56b261 126
mbed_official 90:8818430cfa55 127 if (value < (float)0.0) {
mbed_official 87:085cde657901 128 value = 0.0;
mbed_official 90:8818430cfa55 129 } else if (value > (float)1.0) {
mbed_official 87:085cde657901 130 value = 1.0;
mbed_official 87:085cde657901 131 }
mbed_official 172:2f4f8c56b261 132
mbed_official 87:085cde657901 133 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 125:23cc3068a9e4 134
mbed_official 172:2f4f8c56b261 135 // Configure channels
mbed_official 125:23cc3068a9e4 136 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 125:23cc3068a9e4 137 sConfig.Pulse = obj->pulse;
mbed_official 125:23cc3068a9e4 138 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 172:2f4f8c56b261 139 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 125:23cc3068a9e4 140 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 125:23cc3068a9e4 141 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 125:23cc3068a9e4 142 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 87:085cde657901 143
mbed_official 125:23cc3068a9e4 144 switch (obj->pin) {
mbed_official 226:b062af740e40 145
mbed_official 125:23cc3068a9e4 146 // Channels 1
mbed_official 125:23cc3068a9e4 147 case PA_0:
mbed_official 125:23cc3068a9e4 148 case PA_5:
mbed_official 125:23cc3068a9e4 149 case PA_6:
mbed_official 125:23cc3068a9e4 150 case PA_8:
mbed_official 125:23cc3068a9e4 151 case PA_15:
mbed_official 125:23cc3068a9e4 152 case PB_4:
mbed_official 125:23cc3068a9e4 153 case PB_6:
mbed_official 172:2f4f8c56b261 154 case PC_6:
mbed_official 125:23cc3068a9e4 155 channel = TIM_CHANNEL_1;
mbed_official 125:23cc3068a9e4 156 break;
mbed_official 226:b062af740e40 157
mbed_official 125:23cc3068a9e4 158 // Channels 1N
mbed_official 125:23cc3068a9e4 159 case PA_7:
mbed_official 125:23cc3068a9e4 160 case PB_13:
mbed_official 125:23cc3068a9e4 161 channel = TIM_CHANNEL_1;
mbed_official 125:23cc3068a9e4 162 complementary_channel = 1;
mbed_official 125:23cc3068a9e4 163 break;
mbed_official 226:b062af740e40 164
mbed_official 125:23cc3068a9e4 165 // Channels 2
mbed_official 125:23cc3068a9e4 166 case PA_1:
mbed_official 125:23cc3068a9e4 167 case PA_9:
mbed_official 125:23cc3068a9e4 168 case PB_3:
mbed_official 125:23cc3068a9e4 169 case PB_5:
mbed_official 125:23cc3068a9e4 170 case PB_7:
mbed_official 185:e752b4ee7de1 171 case PC_7:
mbed_official 125:23cc3068a9e4 172 channel = TIM_CHANNEL_2;
mbed_official 125:23cc3068a9e4 173 break;
mbed_official 226:b062af740e40 174
mbed_official 125:23cc3068a9e4 175 // Channels 2N
mbed_official 125:23cc3068a9e4 176 case PB_0:
mbed_official 172:2f4f8c56b261 177 case PB_14:
mbed_official 125:23cc3068a9e4 178 channel = TIM_CHANNEL_2;
mbed_official 125:23cc3068a9e4 179 complementary_channel = 1;
mbed_official 125:23cc3068a9e4 180 break;
mbed_official 226:b062af740e40 181
mbed_official 125:23cc3068a9e4 182 // Channels 3
mbed_official 125:23cc3068a9e4 183 case PA_2:
mbed_official 125:23cc3068a9e4 184 case PA_10:
mbed_official 125:23cc3068a9e4 185 case PB_8:
mbed_official 125:23cc3068a9e4 186 case PB_10:
mbed_official 125:23cc3068a9e4 187 case PC_8:
mbed_official 125:23cc3068a9e4 188 channel = TIM_CHANNEL_3;
mbed_official 125:23cc3068a9e4 189 break;
mbed_official 226:b062af740e40 190
mbed_official 125:23cc3068a9e4 191 // Channels 3N
mbed_official 125:23cc3068a9e4 192 case PB_1:
mbed_official 185:e752b4ee7de1 193 case PB_15:
mbed_official 125:23cc3068a9e4 194 channel = TIM_CHANNEL_3;
mbed_official 125:23cc3068a9e4 195 complementary_channel = 1;
mbed_official 125:23cc3068a9e4 196 break;
mbed_official 226:b062af740e40 197
mbed_official 125:23cc3068a9e4 198 // Channels 4
mbed_official 226:b062af740e40 199 case PA_3:
mbed_official 125:23cc3068a9e4 200 case PA_11:
mbed_official 145:cfacfb0a9e19 201 case PB_9:
mbed_official 172:2f4f8c56b261 202 case PC_9:
mbed_official 125:23cc3068a9e4 203 channel = TIM_CHANNEL_4;
mbed_official 172:2f4f8c56b261 204 break;
mbed_official 226:b062af740e40 205
mbed_official 125:23cc3068a9e4 206 default:
mbed_official 125:23cc3068a9e4 207 return;
mbed_official 87:085cde657901 208 }
mbed_official 172:2f4f8c56b261 209
mbed_official 125:23cc3068a9e4 210 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 125:23cc3068a9e4 211 if (complementary_channel) {
mbed_official 125:23cc3068a9e4 212 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 185:e752b4ee7de1 213 } else {
mbed_official 125:23cc3068a9e4 214 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 125:23cc3068a9e4 215 }
mbed_official 87:085cde657901 216 }
mbed_official 87:085cde657901 217
mbed_official 87:085cde657901 218 float pwmout_read(pwmout_t* obj) {
mbed_official 87:085cde657901 219 float value = 0;
mbed_official 87:085cde657901 220 if (obj->period > 0) {
mbed_official 87:085cde657901 221 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 87:085cde657901 222 }
mbed_official 90:8818430cfa55 223 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 87:085cde657901 224 }
mbed_official 87:085cde657901 225
mbed_official 87:085cde657901 226 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 87:085cde657901 227 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 87:085cde657901 228 }
mbed_official 87:085cde657901 229
mbed_official 87:085cde657901 230 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 87:085cde657901 231 pwmout_period_us(obj, ms * 1000);
mbed_official 87:085cde657901 232 }
mbed_official 87:085cde657901 233
mbed_official 87:085cde657901 234 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 87:085cde657901 235 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 87:085cde657901 236
mbed_official 87:085cde657901 237 float dc = pwmout_read(obj);
mbed_official 172:2f4f8c56b261 238
mbed_official 87:085cde657901 239 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 172:2f4f8c56b261 240
mbed_official 226:b062af740e40 241 // Update the SystemCoreClock variable
mbed_official 226:b062af740e40 242 SystemCoreClockUpdate();
mbed_official 226:b062af740e40 243
mbed_official 87:085cde657901 244 TimHandle.Init.Period = us - 1;
mbed_official 87:085cde657901 245 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 87:085cde657901 246 TimHandle.Init.ClockDivision = 0;
mbed_official 87:085cde657901 247 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 87:085cde657901 248 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 87:085cde657901 249
mbed_official 87:085cde657901 250 // Set duty cycle again
mbed_official 87:085cde657901 251 pwmout_write(obj, dc);
mbed_official 87:085cde657901 252
mbed_official 172:2f4f8c56b261 253 // Save for future use
mbed_official 87:085cde657901 254 obj->period = us;
mbed_official 172:2f4f8c56b261 255
mbed_official 87:085cde657901 256 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 87:085cde657901 257 }
mbed_official 87:085cde657901 258
mbed_official 87:085cde657901 259 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 87:085cde657901 260 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 87:085cde657901 261 }
mbed_official 87:085cde657901 262
mbed_official 87:085cde657901 263 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 87:085cde657901 264 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 87:085cde657901 265 }
mbed_official 87:085cde657901 266
mbed_official 87:085cde657901 267 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 87:085cde657901 268 float value = (float)us / (float)obj->period;
mbed_official 87:085cde657901 269 pwmout_write(obj, value);
mbed_official 87:085cde657901 270 }
mbed_official 172:2f4f8c56b261 271
mbed_official 172:2f4f8c56b261 272 #endif